250 PROCEEDINGS OF THE AMERICAN ACADEMY 
5. D. Acrotricuum, Zuce. Described as resembling the last, with 
panicle narrower and the floral bractlets entire. Fruit not known. — 
Baker, 1. ¢. 
6. D. seRRATIFOLIUM, Zuce. A similar species, imperfectly known; 
leaves not breaking up into fibres at the end. — Baker, 1. c. 298. 
7. D. LAxIFLoruUM, Baker, 1. c. 299. Leaves also not fibre-tipped : 
panicle ovate-thyrsoid. Female flowers and fruit unknown. 
8. D. QUADRANGULATUM. Caudex 3 feet high: leaves drooping, 
dark green, 2 feet long or more, 2 or 3 lines broad at base, soon nar- _ 
rower and quadrangular (nearly square in section), unarmed, scabrous : 
scape about 5 feet high; inflorescence narrow: flowers 14 lines long, 
on very short pedicels : fruit 34 to 5 lines long, the broad wings pro- 
duced upward to the summit of the slender style: stigma-lobes spread- 
ing: seed 2 lines long. — Sierra Nola, Tamaulipas; Dr. E. Palmer, 
1878: a very peculiar species. 
23. HESPEROCALLIS, Gray. 
1. H. unpuLata, Gray. Bulb large: stem stout, leafy, a foot or 
two high, 5-8-flowered: leaves linear, fleshy, carinate, 3 to 6 lines 
wide, the margin undulate: flowers 1} to 2 inches long, on short pedi- 
cels; segments 5—7-nerved: style exserted, the capsule acute with its 
persistent base, sessile, a half-inch long: seeds thin, 2} to 3 lines 
broad. — Proc. Am. Acad. 7. 890; Baker, Trim. Journ. Bot. 11. 
359. Colorado Desert. 
24. HESPERALOE, Engelm. 
1. H. yucc#roria, Engelm. Stem 2 to 4 feet high, sparingly 
branched: leaves a foot or two long, 3 or 4 lines broad, recurved, 
long-attenuate: bracts broad and acuminate, rather large: pedicels 
cymose-fascicled, 4 to 18 lines long: flowers a half to an inch long, 
with erect segments: stamens somewhat shorter; anthers small (a line 
long): style equalling the perianth, at length exserted, 2 or 3 or more 
times longer than the ovary: capsule ovate, acute, an inch long. — 
‘King’s Rep. 5. 497. Yucca (?) parviflora, Torr. Bot. Mex. Bound. 
221. Aloe yuceefolia, Gray, Proc. Amer. Acad. 7. 390. W. Texas 
(from Frio County to mouth of the Pecos). A second species from 
the same region has been proposed (H. Hngelmanni, Krauskopf), but 
is imperfectly known, perhaps to be distinguished by its more slender 
and flexuous branches and smaller bracts, its twice longer anthers, and 
the stouter included style scarcely longer than the ovary. 
